Process for the alkaline saponification of crosslinked pearl polymerisates of acrylonitrile
摘要
Alkaline saponification of crosslinked acrylonitrile pearl polymers involves: (a) saponification at temperature T 1of 70-120[deg]C until a degree of saponification of >=65% is reached; and (b) completing saponification at temperature T 2of 120-180[deg]C, with T 2being >=10[deg]C higher than T 1. An independent claim is also included for a weakly acidic ion-exchanger obtained by the saponification.
申请公布号
EP1486512(A1)
申请公布日期
2004.12.15
申请号
EP20040010764
申请日期
2004.05.06
申请人
LANXESS DEUTSCHLAND GMBH
发明人
HAPP, MICHAEL, DR.;IRMSCHER, DIETER;PODSZUN, WOLFGANG, DR.;SEIDEL, RUEDIGER, DR.;ZARGES, WOLFGANG, DR.